The Subtitles Burn-In Filter was added in Shotcut 24.08
The Subtitle Burn-In Filter can overlay subtitles that have been authored in the Subtitles Panel. The filter can only be added to the Timeline Output.
After you add the Subtitle Burn-In Filter to the Timeline Output, select the subitle track name from the Subtitle Panel that you want to overlay.
The subtitle overlay text can be configured similar to the Simple:Text filter - including the preview window controls for size and position.
